Ask HN: Security Camera That Doesn't Talk to 3rd Parties?

I need to set up an exterior camera that stores or streams video off-device, but I can't have it talking to uncontrolled servers (so nothing like Nest or Ring).

I don't need an app, but I do need the server to be self-hosted.

This is a little outside my experience, and Google isn't being very helpful right. Is this an option on the consumer market?